android 自定义 3D效果饼图

根据前面写的 canvas 和paint的一些用法，

现在就把原来写过的项目中的东西的 一些原始基本代码拿出来记录下。很多功能可以自己在基础上添加，

先来张效果图吧。PS: 这里只是简单的思路代码，其实饼图可以点击后实现点击效果

部分代码：

/** *画饼图类 */@SuppressLint("ViewConstructor")public class PieView extends View {int areaX = 1;int areaY = 22;//饼图的宽高private int areaWidth = 360;   private int areaHight = 300;   //颜色数组private int[] colors =new int[]{Color.rgb(54,217,169),Color.rgb(0,171,255),Color.rgb(80,195,252),Color.rgb(13,142,207),Color.rgb(2,211,21),Color.rgb(176,222,9),Color.rgb(248,255,1),Color.rgb(252,210,2),Color.rgb(255,159,13),Color.rgb(255,100,0),Color.rgb(234,14,0),    };//阴影数组private int[] shade_colors = new int[]{    Color.rgb(26,164,123),Color.rgb(0,154,230),Color.rgb(21,178,255),Color.rgb(5,102,153),    Color.rgb(3,147,15),Color.rgb(124,158,8),Color.rgb(212,218,2),Color.rgb(219,183,6),    Color.rgb(214,135,5),Color.rgb(210,90,13),Color.rgb(199,13,1),    };//区域百分比private int percent[];private String title;private int thickness= 20;float x, y;//默认可响应点击事件private boolean isOntouch= true;//下面的图例文字private String[] info;//点击事件的计算private float centerX;private float centerY;private Context context;    //图例文字的painprivate Paint legendPaint; //饼图的paintprivate Paint mainPaint;//默认显示右边private WHERE where  = WHERE.right;public static enum WHERE{    right ,bottmo} /** * @param context   * @param colors       最上面颜色数组 * @param shade_colors 阴影颜色数组 * @param percent      百分比 (和必须是360) */public PieView(Context context,int[] percent, String[] info) {super(context);this.percent = percent;this.context = context;this.info = info;initPaint();}//初始化 画笔private void initPaint(){legendPaint = new Paint();legendPaint.setColor(Color.BLACK);legendPaint.setStrokeWidth(1f);mainPaint = new Paint();mainPaint.setStyle(Style.FILL);mainPaint.setAntiAlias(true);}//设置饼图的大小  这里已经给了默认大小了public void  setSize(int areaWidth ,int areaHight){this.areaWidth = areaWidth;this.areaHight = areaHight;}//饼图的标题public void setTitle(String title){this.title = title;}    public void setWhere(WHERE s){    this.where =  s;    }public void setThickness(int thickness) {this.thickness = thickness;areaY=thickness+2;this.invalidate();}// 主要访法 @Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);    //开画for(int i=0;i <= thickness;i++){int tempAngle=0;for(int j=0;j< percent.length;j++){//画笔的颜色mainPaint.setColor(shade_colors[j]);//坐标点 start endRectF rectF = new RectF(areaX, areaY-i, areaX+areaWidth, areaHight-i);//画弧canvas.drawArc(rectF, tempAngle,percent[j], true, mainPaint);tempAngle+=percent[j];}//开始画图例区域if(i  == thickness ){RectF rectF = new RectF(areaX, areaY- thickness, areaX + areaWidth, areaHight- thickness);centerX = rectF.centerX();centerY = rectF.centerY();int temp = areaHight + 20/* height-320*/;                for(int j=0;j<percent.length;j++){mainPaint.setColor(colors[j]);canvas.drawArc(rectF , tempAngle,percent[j], true, mainPaint);tempAngle+=percent[j];//说明区域RectF rect = new RectF(areaX, temp, areaX+40, temp-10);//标识区域canvas.drawText(info[j], areaX+60, temp, legendPaint);canvas.drawRect(rect, mainPaint);temp += 25;}}}//for (int i = 0; i < colors.length; i++) {if (isOntouch) {isOntouch = false;System.out.println(centerX + ""  + centerY);double d = Math.atan2(y-centerY, x-centerX)*180/Math.atan2(0.0, -1.0);if (d < 0) {d = 360 + d;}int temp = 0;for (int j = 0; j < percent.length; j++) {Log.e(Float.toString(y), Float.toString(areaHight));if (d >temp && d < percent[j]+temp && y < areaHight) {   System.out.println(" " + colors[j]);//context.startActivity(it);Toast.makeText(context, "colors[j]="+ colors[j]                + "----x,y="+ x+","+y                +"--temp="+ temp,1000).show();}temp += percent[j];}}}}@Overridepublic boolean onTouchEvent(MotionEvent event) {if (event.getAction() == MotionEvent.ACTION_UP) {isOntouch = true;x = event.getX();y = event.getY();invalidate();}return true;}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);}}